High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics

In this study, a K-band offset dielectric reflectarray antenna, having high aperture efficiency and ultra-wideband characteristics, was designed. A column-type dielectric unit cell was employed for the dielectric reflectarray elements. To obtain the ultra-wideband characteristics, an effective arran...

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Autores principales:	Eun-Cheol Choi, Sangwook Nam
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Dielectric antennas millimeter wave reflectarray relative phase error wideband Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/76fb6d21bf2845658df9cd2b2fe797bb
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id	oai:doaj.org-article:76fb6d21bf2845658df9cd2b2fe797bb
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spelling	oai:doaj.org-article:76fb6d21bf2845658df9cd2b2fe797bb2021-11-20T00:02:50ZHigh-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics2169-353610.1109/ACCESS.2021.3125458https://doaj.org/article/76fb6d21bf2845658df9cd2b2fe797bb2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9615118/https://doaj.org/toc/2169-3536In this study, a K-band offset dielectric reflectarray antenna, having high aperture efficiency and ultra-wideband characteristics, was designed. A column-type dielectric unit cell was employed for the dielectric reflectarray elements. To obtain the ultra-wideband characteristics, an effective arrangement of the dielectric elements was implemented by considering the relative phase requirement. In addition, the real phase error and element patterns were calculated and analyzed using the equivalence principle and full-wave simulations. The prototype of the dielectric reflectarray antenna was fabricated by milling a dielectric sheet. The performance of the proposed antenna was measured and observed to be in good agreement with the simulation results. The measured results demonstrate that the maximum aperture efficiency was 63% at 22 GHz and bandwidth for an aperture efficiency exceeding 40% was 42.5%. The achieved results signified the importance of the arrangement strategy of the elements to achieve better efficiency and wider bandwidth performances.Eun-Cheol ChoiSangwook NamIEEEarticleDielectric antennasmillimeter wavereflectarrayrelative phase errorwidebandElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 152075-152081 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dielectric antennas millimeter wave reflectarray relative phase error wideband Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dielectric antennas millimeter wave reflectarray relative phase error wideband Electrical engineering. Electronics. Nuclear engineering TK1-9971 Eun-Cheol Choi Sangwook Nam High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
description	In this study, a K-band offset dielectric reflectarray antenna, having high aperture efficiency and ultra-wideband characteristics, was designed. A column-type dielectric unit cell was employed for the dielectric reflectarray elements. To obtain the ultra-wideband characteristics, an effective arrangement of the dielectric elements was implemented by considering the relative phase requirement. In addition, the real phase error and element patterns were calculated and analyzed using the equivalence principle and full-wave simulations. The prototype of the dielectric reflectarray antenna was fabricated by milling a dielectric sheet. The performance of the proposed antenna was measured and observed to be in good agreement with the simulation results. The measured results demonstrate that the maximum aperture efficiency was 63% at 22 GHz and bandwidth for an aperture efficiency exceeding 40% was 42.5%. The achieved results signified the importance of the arrangement strategy of the elements to achieve better efficiency and wider bandwidth performances.
format	article
author	Eun-Cheol Choi Sangwook Nam
author_facet	Eun-Cheol Choi Sangwook Nam
author_sort	Eun-Cheol Choi
title	High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
title_short	High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
title_full	High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
title_fullStr	High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
title_full_unstemmed	High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics
title_sort	high-efficiency dielectric reflectarray antennas with ultra-wideband characteristics
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/76fb6d21bf2845658df9cd2b2fe797bb
work_keys_str_mv	AT euncheolchoi highefficiencydielectricreflectarrayantennaswithultrawidebandcharacteristics AT sangwooknam highefficiencydielectricreflectarrayantennaswithultrawidebandcharacteristics
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High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics

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